β Scribed by T. Sakai; M. Oikawa; T. Sato; T. Nagamine; H.D. Moon; K. Nakazato; K. Suzuki
No coin nor oath required. For personal study only.
Two unique apparatuses have been installed at in-air micro-PIXE system at JAERI Takasaki. One is a multiple Xray detection system that consists of three X-ray detectors. The efficiency below 2 keV is greatly improved by a new high energy resolution Si(Li) detector, on the other hand higher energy region above 6 keV is covered by a backward X-ray detector that is set just behind a sample. The X-ray detection efficiency is drastically improved by the system. Another improvement is a sample cooling system that blows cryogenic gas ($100 K) from liquid nitrogen onto the sample. This technique enables elemental mapping of a frozen raw biological specimen without serious irradiation damage. These improvements are very useful especially in biological applications.
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